Abstract
The Coronal Magnetograph - CorMag - experiment aims at studying the magnetic field topology of the solar corona. The direction of the coronal magnetic field vector would be derived from narrow-wavelength bandpass observations of the linearly polarized FeXIV line-emission (530.3 nm), interpreted through the saturated Hanle effect. CorMag is an internally-occulted coronagraph whose design was derived from the externally- occulted, formation-flying ASPIICS coronagraph of the PROBA-3 ESA solar mission. Prelim- inary tests of CorMag were carried out during two campaigns in Antarctica at the Concordia Italian-French Station in 2018/2019 and 2019/2020 (Fig. 1). This presentation reports the results of those tests. The European Union-funded HEMERA Program has selected CorMag for a stratospheric balloon flight is 2021. The configuration for this mission will be illustrated, together with the expected polarization sensitivity. This mission is a demonstrator for future space-based coronagraphs with the capability of visible-light and infrared polarization measurements for coronal magnetic field diagnostics.
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